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SrAl2O4：Eu^2＋和SrAl2O4：Eu^2＋，Dy^3＋长余辉和热释光谱
  • ISSN号：1007-5461
  • 期刊名称：《量子电子学报》
  • 时间：0
  • 分类：O482.31[理学—固体物理;理学—物理]
  • 作者机构：[1]广东工业大学物理与光电工程学院,广东广州510006
  • 相关基金：国家自然科学基金（20671022,20871033）
作者： 邓柳咏[1], 胡义华[1], 王银海[1], 吴浩怡[1], 谢伟[1]
关键词： 材料, 陷阱能级, 铝酸锶, 长余辉, 热释光, materials, trap levels, SrAl2O4, long afterglow, thermoluminescence
中文摘要：

采用高温固相法在弱还原气氛中，1300℃合成了掺杂Eu^2＋和Dy^3＋离子的SrAl2O4。对比研究了SrAl2O4：Eu^2＋和SrAl2O4：Eu^2＋，Dy^3＋的余辉特性和热释光谱，并探讨了Dy^3＋的掺杂对SrAl2O4：Eu^2＋陷阱能级的影响。XRD分析表明：Eu^2＋和Dy^3＋的掺杂没有改变SrAl2O4的晶相。光致发光分析表明：Dy^3＋的掺杂没有改变SrAl2O4：Eu^2＋的光致发光光谱和发光中心。热释光谱对比分析结果显示：Eu^2＋的掺杂在SrAl2O4的禁带中引入了两个深度不同的陷阱能级；Dy^3＋的掺杂不改变原来陷阱能级的深度，却能够显著地增加原来浅陷阱能级的密度，从而改善SrAl2O4：Eu^2＋的余辉特性。不同等待时间的热释光谱曲线显示：在室温下，不同陷阱能级衰减规律的差异以及陷阱能级间存在的电子转移，可能造成了SrAl2O4：Eu^2＋，Dy^3＋长余辉材料复杂的余辉衰减规律。

英文摘要：

Phosphors SrAl2O4 doped by Eu^2＋ and Dy^3＋ ions were synthesized by a solid-state reaction at 1300℃ under mild reducing atmosphere of N2-H2. The properties of afterglow and thermoluminescence spectra of SrAl2O4：Eu^2＋and SrAl2O4：Eu^2＋, Dy^3＋ were compared and the influence on trap levels of SrAl2O4：Eu^2＋ by codoping Dy^3＋ was also studied. From the XRD and photoluminescence results, the crystal phase and luminescence band are not changed by codoping Dy^3＋. The thermoluminescence spectra show that the dopant of Eu^2＋ ions could lead into two trap levels with different depth in SrAl2O4. The result of comparison of thermoluminescence properties of SrAl2O4：Eu^2＋ and SrAl2O4：Eu^2＋, Dy^3＋ after different delay time indicates that the density of the original shallow traps is increased by the codopant of Dy^3＋, and the luminescence performance is improved. The thermoluminescence with different delay time indicates that the luminescence decay difference and electron transfer between trap levels in SrAl2O4：Eu^2＋, Dy^3＋ may result in the complicated decay phenomena of the afterglow.

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期刊信息
  • 《量子电子学报》
  • 北大核心期刊（2011版）
  • 主管单位:中国科学院
  • 主办单位:中国光学学会基础光学专业委员会 中国科学院安徽光学精密机械研究所
  • 主编：龚知本
  • 地址：合肥1125号信箱
  • 邮编：230031
  • 邮箱：lk@aiofm.ac.cn
  • 电话：0551-5591564
  • 国际标准刊号：ISSN：1007-5461
  • 国内统一刊号：ISSN：34-1163/TN
  • 邮发代号:26-89
  • 获奖情况:
  • 1997年获“中国光学期刊”二等奖,1994年评比华东地区优秀期刊三等奖,1998年评为安徽省优秀科技期刊二等奖
  • 国内外数据库收录:
  • 俄罗斯文摘杂志,美国化学文摘（网络版）,美国剑桥科学文摘,英国科学文摘数据库,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊（2004版）,中国北大核心期刊（2008版）,中国北大核心期刊（2011版）,中国北大核心期刊（2014版）,英国英国皇家化学学会文摘,中国北大核心期刊（2000版）
  • 被引量:4844